The Nogeoldae is a textbook of colloquial northern Chinese published in Korea in several editions from the 14th to 18th centuries. The book is an important source on both Late Middle Korean and the history of Mandarin Chinese. Later editions were translated into Manchu and Mongolian.

Old Mandarin or Early Mandarin was the speech of northern China during the Jurchen-ruled Jin dynasty and the Mongol-led Yuan dynasty. New genres of vernacular literature were based on this language, including verse, drama and story forms, such as the qu and sanqu.